GET kibana_sample_data_ecommerce/_search
{
  "runtime_mappings": {
    "price_range": {
      "type": "keyword",
      "script": {
        "source": """
           def bucket_start = (long) Math.floor(doc['taxful_total_price'].value / 50) * 50;
           def bucket_end = bucket_start + 50;
           emit(bucket_start.toString() + "-" + bucket_end.toString());
        """
      }
    }
  },
  "size": 0,
  "aggs": {
    "fi": {
      "frequent_items": {
        "minimum_set_size": 3,
        "fields": [
          {
            "field": "category.keyword"
          },
          {
            "field": "price_range"
          },
          {
            "field": "geoip.city_name"
          }
        ]
      }
    }
  }
}